The phrase "a greater variation" is correct and usable in written English.
It can be used when discussing differences or changes in a particular context, often in comparison to something else.
Example: "The study revealed a greater variation in results among the different age groups."
Alternatives: "a larger difference" or "an increased diversity".
Society, he said, must learn to appreciate a greater variation in body shapes and sizes.
When arousal and dominance were both low, there was a greater variation in the emotional responses.
But Ofqual adds: "There has been an unusual distribution pattern, a greater variation between schools than expected.
The composite materials presented a greater variation in terms of perceived attributes than the wood specimens.
The genus Australopithecus, which lived two million to four million years ago, shows a greater variation in diet over geographic region than over time, he said.
Their effects on CH4 production mitigation and milk FA profile depended on DFM strain and diet and should be confirmed under a greater variation of dietary conditions.
We also found that the local SA method produced segments with a greater variation in size, indicating the method is effective for achieving multi-scale segmentation.
In hillslope with a greater variation in soil properties, soil's influence on moisture variation was apparent, but not in transects with relative homogenous soil properties.
She and Salloum recommend shaping tools, which I discover inside a box of Lebanese falafel mix in the grocers, but I find the Roden-sized versions too crunchy; making them bigger allows for a greater variation of texture between the crisp outer and fluffy interior.
Later, the drapery became more fluid, with a greater variation in the folds gained by having one hand of the kore pull the drapery tightly across thighs and buttocks.
However, compared to the zeolite 13X bed, the complete regeneration time in the layered bed was drastically shortened due to a greater variation of the amount of equilibrium adsorption of water under temperature on both silica gel and alumina.
